A Three-Dimensional (42.84)-lvt Topology and a Two-Dimensional Brick-Wall Network: Two Pillared Supramolecular Isomers Exploring the Use of l -Cysteic Acid to Engineer Porous Frameworks
| Autor: | Jin-Lei Tian, Dai-Zheng Liao, Yi-Min Jiang, Hai-Ye Li, Shi-Ping Yan, Wen Gu, Fu-Ping Huang |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Crystal Growth & Design. 9:3191-3196 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/cg801243a |
| Popis: | The preparations via variation of the reactive conditions of the same metal-to-ligand ratios of Co(NO3)2·6H2O with mixed l-cysteic acid (H2cys) and 4,4′-bipyridine (bpy) ligands gave rise to two interesting pillared supramolecular isomers: {[Co2(cys)2(bpy)2(H2O)2]·3H2O}n (1) and {[Co2(cys)2(bpy)(H2O)4](bpy)·H2O}n (2), which have the same formula but distinct solid phases. In the two complexes, Co(II) centers are chelated and bridged by different μ2-cys bridges to form a one-dimensional (1D) 41 helical chain and a 1D zigzag chain, respectively. The two chains are further linked by bpy pillars into a novel three-dimensional (42.84)-lvt structrue (1) and a two-dimensional brick-wall structure (2), respectively. The magnetic behavior of compounds 1 and 2 was studied, and it indicated the existence of small antiferromagnetic coupling. Best fit parameters for 1: J = −0.14 K with R = 4.77 × 10−4; for 2, J = −0.64 K with R = 3.62 × 10−4. |
| Databáze: | OpenAIRE |
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